37. SECKO. — 38. PTTCHozooir. 189 



Leyden Museum. 



J. Reeves, Esq. [P.]. (Type 



of Oeoko chinensis.) 

 Dr. Cantor. (Types of He- 



midactylus nanus.) 

 East-India Company. 

 C. Bowi-ing, Esq. [P.]. 

 Mr. C. Maries [O.J. 

 R. Swinhoe, Esq. [C 

 R. Swinhoe, Esq. [0.' 

 R. Swinhoe, Esq. [C. 

 A. Michie, Esq. [?.]."■ 

 R. Swinhoe, Esq. [C.]. 

 C. Bowring, Esq. [P.]. 



6. Gecko swiahonis. 



Gecko Bwinhonis, Qiinth. Rept. Brit. Ind. p. 104, pi. xii. fig. A. 



Very closely allied to the preceding. Distinguished by the fol- 

 lowing characters : — The dorsal tubercles are very few and the inner 

 pair of chin-shields is constantly small, widely separated, and there 

 is no trace of web between the toes. 



Northern China. 



a. cJ. Pekin. R. Swinhoe [0.]. (Type.) 



h-c. S 2 ■ Pekin. J. Brenchley, Esq. [PJ. 



rf-e. c?- Pekin. S. W. Bushell, Esq. [P.]. 



f-g. 2 . Western hills of Pekin. S. W. Bushell, Esq. [P.]. 



7. Gecko subpalmatus. 

 Gecko subpalmatus, Giinth. Rept. Brit. Ind. p. 104, pi. xii. fig. B. 



Very closely allied to the two preceding. Distinguished in having 

 the back uniformly granulate, without any tubercles. Chin-shields 

 small. A distinct rudiment of web between the three inner toes. 



China. 



a. g . Chikiang. Mr. Fortune [C.]. (Type.) 



38. PTYCHOZOON. 



Ptychozoon. Kuhl, Isis, 1822, p. 475; Wagler, Syst. Ampk. p. 141 ; 



Wiegm. Herp. Mex. p. 20 ; Fitzing. S^st. Rept. p. 100 ; Oray, Cat. 



p. 164 ; Gunth. Rept. Brit. Ind. p. 105. 

 Pteropleura, Gray, Phil. Mag. (2) iii. 1827, p. 54 ; Fitzing. I. c. p. 101. 

 Platydactylus, part, Dum. Sr Bibr. F>p. Gen. iii. p. 290. 



Digits strongly dilated, entirely webbed, with undivided lamellae 

 below ; all but the thumb and inner toe with a compressed curved 

 distal phalanx with retractile claw, originating a little before the 

 extremity of the digital expansion. Limbs and sides of head, body 

 and tail with much developed membranous expansions acting as 

 parachutes. Upper surfaces covered with juxtaposed granular scales 



